{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2001:U3GUJVLEDTQEJY4O4HZ7JY24HY","short_pith_number":"pith:U3GUJVLE","canonical_record":{"source":{"id":"astro-ph/0111250","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-13T18:59:31Z","cross_cats_sorted":[],"title_canon_sha256":"03b3ac87862c5c7078f2521dfd37545737ea7af9c6edef8b4a9168929c3f8e66","abstract_canon_sha256":"a620c4b4b610d22baa0ac9620d2b0f1478f92ae1cbf508856989f3468125bcdb"},"schema_version":"1.0"},"canonical_sha256":"a6cd44d5641ce044e38ee1f3f4e35c3e2f9fb9cbdcffdcf0d956798298e004cc","source":{"kind":"arxiv","id":"astro-ph/0111250","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0111250","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0111250v2","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0111250","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_12","alias_value":"U3GUJVLEDTQE","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_16","alias_value":"U3GUJVLEDTQEJY4O","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_8","alias_value":"U3GUJVLE","created_at":"2026-07-04T16:24:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2001:U3GUJVLEDTQEJY4O4HZ7JY24HY","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0111250","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-13T18:59:31Z","cross_cats_sorted":[],"title_canon_sha256":"03b3ac87862c5c7078f2521dfd37545737ea7af9c6edef8b4a9168929c3f8e66","abstract_canon_sha256":"a620c4b4b610d22baa0ac9620d2b0f1478f92ae1cbf508856989f3468125bcdb"},"schema_version":"1.0"},"canonical_sha256":"a6cd44d5641ce044e38ee1f3f4e35c3e2f9fb9cbdcffdcf0d956798298e004cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:24:27.322859Z","signature_b64":"Ytm/Liq9y7kOHHbj+gNUxyB/D8FObxSKFJyT4XdJkAhYjUAg0wIOsxtEfqOyuFxxHU77QyEnZv8ENSE20XB2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6cd44d5641ce044e38ee1f3f4e35c3e2f9fb9cbdcffdcf0d956798298e004cc","last_reissued_at":"2026-07-04T16:24:27.322155Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:24:27.322155Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0111250","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:24:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1kGNJWaLMt97ni/XIiFaH2An57AbgSHhjFLU4rk/nEkSI+b/WIMXMmD+l9QUpP8hE40IGJj/+jGe2vhTx9xIAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:16:19.594031Z"},"content_sha256":"2a462333f3ff4a3f0a5b8cd6c38e2b63605ea297c0d60aea7623b01736c03e92","schema_version":"1.0","event_id":"sha256:2a462333f3ff4a3f0a5b8cd6c38e2b63605ea297c0d60aea7623b01736c03e92"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2001:U3GUJVLEDTQEJY4O4HZ7JY24HY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Trispectrum of the 4 Year COBE-DMR data","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. Banday, K. M. Gorski, M. Kunz, P. G. Castro, P. G. Ferreira","submitted_at":"2001-11-13T18:59:31Z","abstract_excerpt":"We propose an estimator for the trispectrum of a scalar random field on a sphere, discuss its geometrical and statistical properties, and outline its implementation. By estimating the trispectrum of the 4 year COBE-DMR data (in HEALPix pixelization) we find new evidence of a non-Gaussian signal associated with a known systematic effect. We find that by removing data from the sky maps for those periods of time perturbed by this effect, the amplitudes of the trispectrum coefficients become completely consistent with predictions for a Gaussian sky. These results reinforce the importance of statis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0111250","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0111250/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:24:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxk6cBZ1/75v+vjr9BYOTktM0eQJ+ew8ul+zH3k+PDhDbDeGAlj+2HT2GkKbW2Hff+DEu22RfYf2XObhdtrNAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T02:16:19.594549Z"},"content_sha256":"3f3569540e4206e9c64389b4cb02a063a906d0fb21102b6c6396f83dc1fe6315","schema_version":"1.0","event_id":"sha256:3f3569540e4206e9c64389b4cb02a063a906d0fb21102b6c6396f83dc1fe6315"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/bundle.json","state_url":"https://pith.science/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-06T02:16:19Z","links":{"resolver":"https://pith.science/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY","bundle":"https://pith.science/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/bundle.json","state":"https://pith.science/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U3GUJVLEDTQEJY4O4HZ7JY24HY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:U3GUJVLEDTQEJY4O4HZ7JY24HY","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"a620c4b4b610d22baa0ac9620d2b0f1478f92ae1cbf508856989f3468125bcdb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-13T18:59:31Z","title_canon_sha256":"03b3ac87862c5c7078f2521dfd37545737ea7af9c6edef8b4a9168929c3f8e66"},"schema_version":"1.0","source":{"id":"astro-ph/0111250","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0111250","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0111250v2","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0111250","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_12","alias_value":"U3GUJVLEDTQE","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_16","alias_value":"U3GUJVLEDTQEJY4O","created_at":"2026-07-04T16:24:27Z"},{"alias_kind":"pith_short_8","alias_value":"U3GUJVLE","created_at":"2026-07-04T16:24:27Z"}],"graph_snapshots":[{"event_id":"sha256:3f3569540e4206e9c64389b4cb02a063a906d0fb21102b6c6396f83dc1fe6315","target":"graph","created_at":"2026-07-04T16:24:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0111250/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose an estimator for the trispectrum of a scalar random field on a sphere, discuss its geometrical and statistical properties, and outline its implementation. By estimating the trispectrum of the 4 year COBE-DMR data (in HEALPix pixelization) we find new evidence of a non-Gaussian signal associated with a known systematic effect. We find that by removing data from the sky maps for those periods of time perturbed by this effect, the amplitudes of the trispectrum coefficients become completely consistent with predictions for a Gaussian sky. These results reinforce the importance of statis","authors_text":"A. J. Banday, K. M. Gorski, M. Kunz, P. G. Castro, P. G. Ferreira","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2001-11-13T18:59:31Z","title":"The Trispectrum of the 4 Year COBE-DMR data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0111250","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2a462333f3ff4a3f0a5b8cd6c38e2b63605ea297c0d60aea7623b01736c03e92","target":"record","created_at":"2026-07-04T16:24:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"a620c4b4b610d22baa0ac9620d2b0f1478f92ae1cbf508856989f3468125bcdb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2001-11-13T18:59:31Z","title_canon_sha256":"03b3ac87862c5c7078f2521dfd37545737ea7af9c6edef8b4a9168929c3f8e66"},"schema_version":"1.0","source":{"id":"astro-ph/0111250","kind":"arxiv","version":2}},"canonical_sha256":"a6cd44d5641ce044e38ee1f3f4e35c3e2f9fb9cbdcffdcf0d956798298e004cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6cd44d5641ce044e38ee1f3f4e35c3e2f9fb9cbdcffdcf0d956798298e004cc","first_computed_at":"2026-07-04T16:24:27.322155Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:24:27.322155Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ytm/Liq9y7kOHHbj+gNUxyB/D8FObxSKFJyT4XdJkAhYjUAg0wIOsxtEfqOyuFxxHU77QyEnZv8ENSE20XB2AQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:24:27.322859Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0111250","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a462333f3ff4a3f0a5b8cd6c38e2b63605ea297c0d60aea7623b01736c03e92","sha256:3f3569540e4206e9c64389b4cb02a063a906d0fb21102b6c6396f83dc1fe6315"],"state_sha256":"277057d0b0f83613cc784fbe5715121313d1814f3915033a87772cf4dd9d8acd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H09rIJ9DKIB2+3Q7VbXrO7cyU7XwmOsfEX8hxJpQpyZ0wUoMD87tp8NPuEn3phWPlIvPPWlqebW+P3SdmN/nCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T02:16:19.597778Z","bundle_sha256":"cb368728733d55b0fb52851d83deaeb18805aa69a56b682da6e252053a3a982d"}}